
8. PROGRAMMING
MELSEC-A
8-2
8.2
Data I/O with Slave
8.2.1
Normal service mode (MODE switch : No. 0)
Communication
READY
X1B
Module
READY
X1D
Exchange
Start End
Exchange
start
instruction
Initial output data write
Exchange start
Exchange
start end
Watchdog
timer error
Communication
READY
X1B
Module
Data read
Processing program using received data
Transmission data ON/OFF program
Data write
Communication
trouble detection
Trouble detection
signal reset
instruction
RST reset instruction
X00
Y00
TOP
H0
K960
K4Y100
K5
Y00
X00
Exchange
start end
X00
X0D
READY
X1D
Communication
READY
X1B
Module
X0D
READY
X1D
FROM
H0
K0
K4X100
K5
X100
X14F
Y100
Y14F
TOP
H0
K960
K4Y100
K5
FROM
H0
K0
K4X100
K5
X01
X01
Y01
Watchdog
timer error
Point
Pay attention to the increase of the scan time since it will take at least 3.3ms to process the
FROM/TO instruction.
It is recommended to perform the FROM/TO instruction for the AJ71PB92D/A1SJ71PB92D only
once in each sequence scan.